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(-) Description

Title :  CRYSTAL STRUCTURE OF MUTANT LYS8ASP OF SCORPION ALPHA-LIKE NEUROTOXIN BMK M1 FROM BUTHUS MARTENSII KARSCH
 
Authors :  Y. Xiang, R. J. Guan, X. L. He, C. G. Wang, M. Wang, Y. Zhang, E. J. Sundberg, D. C. Wang
Date :  08 May 04  (Deposition) - 07 Sep 04  (Release) - 24 Feb 09  (Revision)
Method :  X-RAY DIFFRACTION
Resolution :  1.50
Chains :  Asym./Biol. Unit :  A
Keywords :  Intramolecular Switch, Cis/Trans Isomerization, Non-Proline Peptide Bond, Scorpion Toxin (Keyword Search: [Gene Ontology, PubMed, Web (Google)] )
 
Reference :  R. J. Guan, Y. Xiang, X. L. He, C. G. Wang, M. Wang, Y. Zhang, E. J. Sundberg, D. C. Wang
Structural Mechanism Governing Cis And Trans Isomeric States And An Intramolecular Switch For Cis/Trans Isomerization Of A Non-Proline Peptide Bond Observed In Crystal Structures Of Scorpion Toxins
J. Mol. Biol. V. 341 1189 2004
PubMed-ID: 15321715  |  Reference-DOI: 10.1016/J.JMB.2004.06.067
(for further references see the PDB file header)

(-) Compounds

Molecule 1 - ALPHA-LIKE NEUROTOXIN BMK-I
    Chains: A
    Engineered: YES
    Expression System: SACCHAROMYCES CEREVISIAE
    Expression System Common: BAKER'S YEAST
    Expression System Plasmid: PVT 102U-ALPHA
    Expression System Strain: S-78
    Expression System Taxid: 4932
    Expression System Vector Type: PLASMID
    Gene: BMK M1
    Mutation: YES
    Organism Common: CHINESE SCORPION
    Organism Scientific: MESOBUTHUS MARTENSII
    Organism Taxid: 34649
    Synonym: BMK M1, BMK I, BMKI, BMK1, BMK-M1, BMKM1

 Structural Features

(-) Chains, Units

  1
Asymmetric/Biological Unit : A

Summary Information (see also Sequences/Alignments below)

(-) Ligands, Modified Residues, Ions  (0, 0)

(no "Ligand,Modified Residues,Ions" information available for 1T7A)

(-) Sites  (0, 0)

(no "Site" information available for 1T7A)

(-) SS Bonds  (4, 4)

Asymmetric/Biological Unit
No.Residues
1A:14 -A:65
2A:18 -A:38
3A:24 -A:48
4A:28 -A:50

(-) Cis Peptide Bonds  (0, 0)

(no "Cis Peptide Bond" information available for 1T7A)

 Sequence-Structure Mapping

(-) SAPs(SNPs)/Variants  (0, 0)

(no "SAP(SNP)/Variant" information available for 1T7A)

(-) PROSITE Motifs  (0, 0)

(no "PROSITE Motif" information available for 1T7A)

(-) Exons   (0, 0)

(no "Exon" information available for 1T7A)

(-) Sequences/Alignments

Asymmetric/Biological Unit
   Reformat: Number of residues per line =  ('0' or empty: single-line sequence representation)
  Number of residues per labelling interval =   
  UniProt sequence: complete  aligned part    
   Show mapping: SCOP domains CATH domains Pfam domains Secondary structure (by author)
SAPs(SNPs) PROSITE motifs Exons
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Chain A from PDB  Type:PROTEIN  Length:66
 aligned with SCX1_MESMA | P45697 from UniProtKB/Swiss-Prot  Length:84

    Alignment length:66
                                    27        37        47        57        67        77      
            SCX1_MESMA   18 ESVRDAYIAKPHNCVYECARNEYCNDLCTKNGAKSGYCQWVGKYGNGCWCIELPDNVPIRVPGKCH 83
               SCOP domains d1t7aa_ A: Scorpion toxin                                          SCOP domains
               CATH domains 1t7aA00 A:1-66  [code=3.30.30.10, no name defined]                 CATH domains
               Pfam domains ---Toxin_3-1t7aA01 A:4-57                                --------- Pfam domains
         Sec.struct. author ..eeeee............hhhhhhhhhhhh...eeeee.......eeeeeeee............ Sec.struct. author
                 SAPs(SNPs) ------------------------------------------------------------------ SAPs(SNPs)
                    PROSITE ------------------------------------------------------------------ PROSITE
                 Transcript ------------------------------------------------------------------ Transcript
                  1t7a A  1 NSVRDAYIADPHNCVYECARNEYCNDLCTKNGAKSGYCQWVGKYGNGCWCIELPDNVPIRVPGKCH 66
                                    10        20        30        40        50        60
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  extra numbering lines below/above indicate numbering irregularities and modified residue names etc., number ends below/above '|'

 Classification and Annotation

(-) SCOP Domains  (1, 1)

Asymmetric/Biological Unit
(-)
Class: Small proteins (3458)

(-) CATH Domains  (1, 1)

Asymmetric/Biological Unit
(-)
Class: Alpha Beta (26913)

(-) Pfam Domains  (1, 1)

Asymmetric/Biological Unit
(-)
Clan: Knottin_1 (78)

(-) Gene Ontology  (3, 3)

Asymmetric/Biological Unit(hide GO term definitions)
Chain A   (SCX1_MESMA | P45697)
molecular function
    GO:0008200    ion channel inhibitor activity    Stops, prevents, or reduces the activity of an ion channel.
biological process
    GO:0006952    defense response    Reactions, triggered in response to the presence of a foreign body or the occurrence of an injury, which result in restriction of damage to the organism attacked or prevention/recovery from the infection caused by the attack.
cellular component
    GO:0005576    extracellular region    The space external to the outermost structure of a cell. For cells without external protective or external encapsulating structures this refers to space outside of the plasma membrane. This term covers the host cell environment outside an intracellular parasite.

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 Related Entries

(-) Entries Sharing at Least One Protein Chain (UniProt ID)

UniProtKB/Swiss-Prot
        SCX1_MESMA | P45697: 1djt 1sn1 1t7b 1t7e 1zu3 1zut 1zve 1zvg 1zyv 1zyw

(-) Related Entries Specified in the PDB File

1sn1 STRUCTURE OF SCORPION NEUROTOXIN BMK M1
1t7b THE SAME PROTEIN, K8Q MUTANT
1t7e THE SAME PROTEIN, P9S MUTANT